_:n1785c2a0b2614359bad35ab1ae9560baxb18
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"A number of things need to come together to eliminate any lead screw wobble.Start\n by making sure that the gantry&#039;s linear guides are tight against the \npillar. The guides should not be over tightened though, they should \nstill allow for motion of the gantry. When rotating the eccentric guides\n to tighten against the pillar check that you are still able to move the\n gantry by rotating the lead screw.Next is the positioning of the lead screw and motor shaft inside the coupling:https://makertech-3d.dozuki.com/Guide/Stage+06:+Gantry/56?lang=en#s624 Make sure that inside the coupling the lead screw and motor shaft are touching - there should be absolutely no gap.Finally\n is the lead screw bracket and cap. The lead screw cap will need proper \nlubrication in order to be effective, the best in our opinion is dry \nbike chain lubricant (Teflon kind), but cooking oil (olive/vegetable) \nworks well too.The lead screw bracket needs to be installed as flat as possible, if installed at an angle it will cause z-wobble.The bracket also needs to be pressing down on the lead screw to prevent any vertical movement.The linear guides, the coupling and bracket all need to be setup correctly, as outlines here, for the best results.Checking:Manually\n rotate the lead screw moving the gantry up and down, if there is any \nbinding/bouncing of the gantry or stretching of the coupling then the \nbracket isn&#039;t pressed down on the lead screw enough or there is a gap \nbetween the lead screw and motor shaft inside the coupling. In pronterface move the gantry up and down whilst looking at the gantry\n from the front of the printer, check to see if there&#039;s any side to side\n wobbling at the front end of the gantry, nearest the LCD display. If \nthere is then either the lubricant is not effective enough or the \nbracket has been fixed at an angle.Also remember that the lead screw itself wobbling is OK and expected, that wobble should however not translate over to the gantry arm and hence the print.Finally, it&#039;s think it&#039;s worth mentioning that metal couplings are also available \nif anyone is still struggling with z-wobble and is wondering if any \ncomponent itself could be upgraded. If you are considering this upgrade \nthen we recommend the type that clamps onto the shaft, the correct size \nis 5x8.Make sure to still follow these steps, even with a metal coupling.https://www.aliexpress.com/item/4000281764467.html?"
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